LMP2021, LMP2022

www.ti.com

SNOSAY9D – SEPTEMBER 2008 – REVISED JULY 2009

LMP2021/LMP2022 Zero Drift, Low Noise, EMI Hardened Amplifiers

Check for Samples: LMP2021, LMP2022

1

FEATURES

•

Input Bias Current ±25 pA

23

•

GBW 5 MHz

•

Slew Rate 2.6 V/µs

•

Input Offset Voltage (typical)

−0.4 µV

•

Operating Temperature Range

−40°C to 125°C

•

Input Offset Voltage (max) ±5 µV

•

5-Pin SOT-23, 8-Pin VSSOP and 8-Pin SOIC

•

Input Offset Voltage Drift (typical) -0.004 µV/°C

Packages

•

Input Offset Voltage Drift (max) ±0.02 µV/°C

•

APPLICATIONS

•

Open Loop Gain 160 dB

•

Precision Instrumentation Amplifiers

•

CMRR 139 dB

•

Battery Powered Instrumentation

•

PSRR 130 dB

•

Thermocouple Amplifiers

•

Supply Voltage Range 2.2V to 5.5V

•

Bridge Amplifiers

•

Supply Current (per Amplifier) 1.1 mA

DESCRIPTION

The LMP2021/LMP2022 are single and dual precision operational amplifiers offering ultra low input offset

voltage, near zero input offset voltage drift, very low input voltage noise and very high open loop gain. They are

part of the LMP™ precision family and are ideal for instrumentation and sensor interfaces.

The LMP2021/LMP2022 have only 0.004 µV/°C of input offset voltage drift, and 0.4 µV of input offset voltage.

These attributes provide great precision in high accuracy applications.

The proprietary continuous correction circuitry guarantees impressive CMRR and PSRR, removes the 1/f noise

component, and eliminates the need for calibration in many circuits.

are suitable for low frequency applications such as industrial precision weigh scales. The low input bias current of

23 pA makes these excellent choices for high source impedance circuits such as non-invasive medical

instrumentation as well as test and measurement equipment. The extremely high open loop gain of 160 dB

drastically reduces gain error in high gain applications. With ultra precision DC specifications and very low noise,

the LMP2021/LMP2022 are ideal for position sensors, bridge sensors, pressure sensors, medical equipment and

other high accuracy applications with very low error budgets.

The LMP2021 is offered in 5-Pin SOT-23 and 8-Pin SOIC packages. The LMP2022 is offered in 8-Pin VSSOP

and 8-Pin SOIC packages.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

LMP is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.